Buffing wheel



Patented ug, l2, lgdlm CHARLES l?. SCHLEGEL, OF ROCHESTER, NEW YORK.

BUEFING WHEEL.

Application led January 12, 1921.

To all whom t may concern.'

Beit known that I, CHARLES P. SCHLEGEL, of Rochester, in the county ofMonroe and State of New York, have invented certain new and usefulImprovements in Bufling Wheels; and I do hereby declare the following tobe a full, clear, and exact description of the same, reference being hadto the aon companying drawings, forming a part of this specification,and to the reference numerals marked thereon.

My present invention relates to buifing and polishing and moreparticularly to buffing and polishing wheels such as the soft wheelsordinarily made of laminated fabric stitched together and run at highspeed with the application of an abrasive thereto to clean and polishmetal surfaces and the invention has for its object to provide a simple,cheap and efficient wheel of this general nature which will have greaterwearing qualities than. those heretofore provided and which will presentthe: fabricated material. to wearing contact with the work in a mannermost effective to obtain a maximum of bufiing or polishing surface froma given amount of fabric. 'Io these and other ends the invention residesin certain improvements and combinations of parts all as will behereinafter more fully described, the novel features being pointed outin the claims at the end of the specification.

In the drawings:

Figure l is a side view of a bufiing wheel constructed in accordancewith and illustrating one embodiment of my invention;

Figure 2 is a section on the line 242 thereof, and

Figure 3 is an enlarged view of a portion of the specially woven fabricthat I prefer to use, the same being shown in the process of weaving.

Similar reference numerals throughout the several views indicate thesame parts.

To first give a general idea of the novel features of my invention, Iprovide a wheel consisting of a multiplicity of threads A. all of whichare radial to the center of the wheel and are held together by aplurality of circular rows of relatively transverse threads B all ofwhich are part of a continuons strip of fabric woven in a spiral form sothat it may be coiled to provide a wheel as thick as may be desired, theconvolutions being superposed as'indicated at C, C', C2, @E in Figure 2and the opening 'D serial no. 436,773.

being formed at the center for the reception of the shaft and headclamp.in the usual manner. The ends of the spiral strip shown in Figure2 are preferably stitched down, or fastened in any desired or convenientmanner.

Ordinarily, in the manufacture of buffing wheels of this kind a numberof plies of heavy cotton fabric of simple weave are si"mvply stitchedtogether, cut into circular form and a hole punched at the center. Thewarp and weft threads of the fabric being at right angles, they are eachsubstantially radial at certain points in the circumference within verylimited sectors, while at other points they run tangentially orsubstantially so. These tangential threads present their sides insteadof their ends at the wearing `perimeter of the wheel and hence ravelquickly and great lengths of them drop from the wheel intact and beforethey have had an opportunity to give any substantial polishing eifect.The few threads that are ra dial are properly disposed to give theirmaximum wearing effect, their ends engaging the surface with a lateralbrushing contact that ultimately consumes them in useful wear, but thesethreads are relatively few in proportion to the number actually presentin the whole wheel. Furthermore, such a wheell does not present auniform buliing perimeter but one in which the density of the fabricfibers varies noticeably at successive points on the circumference.

With my wheel, the threads being all radial as presented at theperimeter, they are all worn down endwise and give a brushing sort of apolishing surface in which the fibers are of an even density. Inconstructing it I provide a plurality of warp threads l, 2, 3, 4, 5, 6,7, and 8 as shown in Figure 3, which threads become the transversebinding thread B of Figure 1, except that the outer warp 1 has beentrimmed off in that gure. In the order named, these warp threads areprogressively longer than onel another toprovide the circular bindings Bof the relative proportions shown in Figure 1, so that the lastmentioned thread 8 is only as long as the circumference of the shaft orof the central opening l), while the outermost one 2 in the completedwheel is nearly equal to the circumference of the wheel. This is due tothe weaving method shown in Figure 3 whereby the weft threads a, l), 0,d, e, f, g, become the radial threads A as first lmentioned. By thismethod, the Weft thread a picks up the Warp 8, the weft thread the Warp7, the weft thread c the Warp 6, and so on, so that st-arting from thefull Width, the weft threads are progressively shorter according to thedistances between the Warp threads until the final weft thread g extendsonly betiveenthe warps 1 and 2. Suchrgroup of weft threads is thenrepeated, the next one extending the full Width of the cloth to 8 and soon. The comb of the loom' Which has operated upon the two groups ofvveft threads at the left of Figure 3 but not upon the group at theright, packs these threads together along the line of contact normal tothe Warp threads as they lie in the loom but at an angle to them as theypass on to the Winding or takeup roll so that each group of weft threadsconstitutes a segment of the circular Wheel and gives the spiral form tothe Woven strip as it leaves the loom. Each weft thread liessubstantially radially and the shorter ones fill in the spaces thatwould otherwise be left'betvveen the truly radial threads a that run allthe Way to the center.

With this formation of the iveft a special Winding-off mechanism isprovided on the loom inasmuch as the side of the fabric strip containingthe Warp 1 is longer and must be taken up faster than the sideConstituted by the warp 8 but this is a separateinvention of mine notnecessary to this explanation.

As before mentioned, the selvage in the region of the Warp 1 ispreferably trimmed off as sho-Wn in .Figure 1 When the VWheel is formedor before it is put into use, although, of course, it would ultimatelyWear off. Obviously, Wheels of greater or less body or thickness can bemade by using long or shortrstrips of the spiral fabric; thusindefinitely multiplying the number of convollutionsror plies and it isobvious that variations from the particular Weave shown may be restortedto to alter the density of the fabric and also the number and characterof the circular or Warp threads may be varied. I refer Vto threads in abroad sense as meaning fine strands of any material suitable for makingrotary buffers and similarly by ar Woven fabric I intend to refer to onein which the strands are interlaced, Whetherthey are made on a loom orare knitted or stitched.

1 I claimas my invention:

1.,- A circular one-piece Woven fabric buffing 'Wheel in Ywhich all ofthe Weft threads are arrangedr radially in the same plane.

2. A circular one-piece Woven fabric buffing Wheel` in'whieh all of theWeft threads areV Aarranged radially in the same plane and the. Warpthreads circularlv.

3. A circular Woven fabric batting. Wheel embodying a multiplicity 0fradial threads arranged side by side throughout the circumference of thewheel and varying` progressively in length in the pla-ne of the Wovenfabric.

4L. A circular Woven fabric butliug wheel embodying a multiplicity ofradial threads arranged side by side throughout the circumference of theWheel and varying progressively in length in the plane of the wovenfabricin combination with relatively transverse binding threadsconnecting the inner ends of the radial threads.

5. A circular Woven fabric bulfing wheel embodying a multiplicity ofradial threads arranged side by side in uniform Igroups repeatedprogressively throughout the eircumference of the Wheel, the threads ofeach group varyingprogressively in length. in combination withrelatively transverse binding threads circularly arranged to connect theinner ends of radial threads of like length.

6. A circular buiing Wheel embody-ing a continuous strip of fabric Woveniu the form of a helix.

'i'. A circular bufling Wheel composed of a continuous strip of fabricWoven in spiral form and Wound into superposed convolutions, the fabricstrip embodying a long outer circumferential warp thread andprogressively shorter inner circular warp threads together with repeatedgroups of weft threads, 'the threads of each group being of differentlengths all extended from the outer Warp thread and terminating at therespective inner Warp threads, respectively.

S. A circular bufling wheel embodying a continuous strip of Woven fabricin the form of a helix, `the Warp threads being relatively shorter asthey approach the center.

9. A circular bufling wheel embodying a continuous strip of Woven fabricin the form of a helix, the warp threads being relatively shorter asthey approach the center and the weft threads being substantiallyradially arranged and of different lengths.

10. A circular builing Wheel embodying a continuous strip of Wovenfabric in the form of a helix, the Warp threads being relatively shorteras they approach the center and the Weft threads being substantiallyradially arranged in groups, the units of Which vary progressively inlength.

11. A rotary bufling Wheel embodying a Woven unit in which. the Warpthreads are concentrically arranged with respect to the center ofthe-Wheel and relatively shorter as they approach said center.

12. A bufling Wheel having` a body composed of radial threads andrelatively transverse binding threads interlaced therewith in concentriccircles about the center of the wheel.

.- CHARLES P. SCHLEGEL.

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